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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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14.20 Petroleum refining industry 975<br />

14.19.2.8 Appendix - Classification <strong>of</strong> coalescing solvents<br />

Coalescent Type Type <strong>of</strong> Species Examples Comments<br />

Type A Hydrocarbons White Spirit<br />

Type AB Diesters<br />

DBE Dimethyl esters<br />

DBE Diisobutyl esters<br />

Di-isobutyl adipate<br />

Di-isopropyl adipate<br />

Dibutyl phthalate<br />

Type AB Ester alcohols Diol Monoesters Texanol<br />

Type ABC<br />

Type ABC<br />

Glycol esters &<br />

Glycol ester ethers<br />

Ether alcohols<br />

& diethers<br />

Type C Glycols<br />

PGDA<br />

Butyldiglycol acetate<br />

PnBS<br />

2-Butoxyethanol<br />

MPG Diethers<br />

DEG<br />

DPG<br />

TEG<br />

Estasol, Du Pont<br />

DBE’s<br />

Coasol, Lusolvan<br />

Chemoxy new products<br />

Dow Products<br />

BASF and others<br />

Proglides and glymes<br />

14.20 PETROLEUM REFINING INDUSTRY<br />

<strong>George</strong> <strong>Wypych</strong><br />

ChemTec Laboratories, Inc., Toronto, Canada<br />

The US petroleum refining industry generates sales <strong>of</strong> over $140 billion with only about<br />

200 plants. It employs 75,000 people. About 90% <strong>of</strong> the products used in US are fuels <strong>of</strong><br />

which 43% is gasoline. Figure 14.20.1 illustrates how the products breakdown. The process<br />

is described in detail in Chapter 3. Emissions <strong>of</strong> hydrocarbons to the atmosphere occur at<br />

almost every stage <strong>of</strong> the production process. <strong>Solvents</strong> are produced in various processes<br />

and they are also used to extract aromatics from lube oil feedstock, deasphalting <strong>of</strong><br />

lubricating base stocks, sulfur recovery from gas stream, production <strong>of</strong> solvent additives for<br />

motor fuels such as methyl tert-butyl ether and tert-amyl methyl ether, and various cleaning<br />

operations. Emissions to atmosphere include fugitive emissions <strong>of</strong> the volatile components<br />

<strong>of</strong> crude oil and its fractions, emissions from incomplete combustion <strong>of</strong> fuel in heating<br />

system, and various refinery processes. Fugitive emissions arise from thousands <strong>of</strong> valves,<br />

pumps, tanks, pressure relief valves, flanges, etc. Individual leaks may be small but their<br />

combined quantity results in the petrochemical industry contributing the largest quantity <strong>of</strong><br />

emissions and transfers.<br />

Tables 14.20.1 and 14.20.2 give solvent releases and transfers data for the petroleum<br />

refining industry. Transfers are small fraction <strong>of</strong> releases which means that most wastes are<br />

processed on-site.<br />

In addition to emissions to atmosphere, some plants have caused contamination <strong>of</strong><br />

ground water by releasing cooling and process water.

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